<html lang="en"><head></head><body>
    <form id="mainForm" method="post" action="https://run.stackblitz.com/api/angular/v1" target="_self"><input type="hidden" name="files[src/app/app.component.ts]" value="import { Component } from '@angular/core';

import { Hero, heroes } from './hero';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent {
  heroes = heroes;
  hero = this.heroes[0];

  condition = false;
  logs: string[] = [];
  showSad = true;
  status = 'ready';

  trackById(index: number, hero: Hero): number { return hero.id; }
}


/*
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/"><input type="hidden" name="files[src/app/app.module.ts]" value="import { NgModule }      from '@angular/core';
import { FormsModule }   from '@angular/forms';
import { BrowserModule } from '@angular/platform-browser';

import { AppComponent }         from './app.component';
import { heroSwitchComponents } from './hero-switch.components';
import { UnlessDirective }    from './unless.directive';

@NgModule({
  imports: [ BrowserModule, FormsModule ],
  declarations: [
    AppComponent,
    heroSwitchComponents,
    UnlessDirective
  ],
  bootstrap: [ AppComponent ]
})
export class AppModule { }


/*
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/"><input type="hidden" name="files[src/app/hero-switch.components.ts]" value="import { Component, Input } from '@angular/core';
import { Hero } from './hero';

@Component({
  selector: 'app-happy-hero',
  template: `Wow. You like {{hero.name}}. What a happy hero ... just like you.`
})
export class HappyHeroComponent {
  @Input() hero: Hero;
}

@Component({
  selector: 'app-sad-hero',
  template: `You like {{hero.name}}? Such a sad hero. Are you sad too?`
})
export class SadHeroComponent {
  @Input() hero: Hero;
}

@Component({
  selector: 'app-confused-hero',
  template: `Are you as confused as {{hero.name}}?`
})
export class ConfusedHeroComponent {
  @Input() hero: Hero;
}

@Component({
  selector: 'app-unknown-hero',
  template: `{{message}}`
})
export class UnknownHeroComponent {
  @Input() hero: Hero;
  get message() {
    return this.hero &amp;&amp; this.hero.name ?
      `${this.hero.name} is strange and mysterious.` :
      'Are you feeling indecisive?';
  }
}

export const heroSwitchComponents =
  [ HappyHeroComponent, SadHeroComponent, ConfusedHeroComponent, UnknownHeroComponent ];


/*
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/"><input type="hidden" name="files[src/app/hero.ts]" value="export class Hero {
  id: number;
  name: string;
  emotion?: string;
}

export const heroes: Hero[] = [
  { id: 1, name: 'Mr. Nice',  emotion: 'happy'},
  { id: 2, name: 'Narco',     emotion: 'sad' },
  { id: 3, name: 'Windstorm', emotion: 'confused' },
  { id: 4, name: 'Magneta'}
];


/*
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/"><input type="hidden" name="files[src/app/unless.directive.ts]" value="import { Directive, Input, TemplateRef, ViewContainerRef } from '@angular/core';

/**
 * Add the template content to the DOM unless the condition is true.
 *
 * If the expression assigned to `appUnless` evaluates to a truthy value
 * then the templated elements are removed removed from the DOM,
 * the templated elements are (re)inserted into the DOM.
 *
 * <div *ngUnless=&quot;errorCount&quot; class=&quot;success&quot;>
 *   Congrats! Everything is great!
 * </div>
 *
 * ### Syntax
 *
 * - `<div *appUnless=&quot;condition&quot;>...</div>`
 * - `<ng-template [appUnless]=&quot;condition&quot;><div>...</div></ng-template>`
 *
 */
@Directive({ selector: '[appUnless]'})
export class UnlessDirective {
  private hasView = false;

  constructor(
    private templateRef: TemplateRef<any>,
    private viewContainer: ViewContainerRef) { }

  @Input() set appUnless(condition: boolean) {
    if (!condition &amp;&amp; !this.hasView) {
      this.viewContainer.createEmbeddedView(this.templateRef);
      this.hasView = true;
    } else if (condition &amp;&amp; this.hasView) {
      this.viewContainer.clear();
      this.hasView = false;
    }
  }
}


/*
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/"><input type="hidden" name="files[src/environments/environment.prod.ts]" value="export const environment = {
  production: true
};


/*
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/"><input type="hidden" name="files[src/environments/environment.ts]" value="// This file can be replaced during build by using the `fileReplacements` array.
// `ng build --prod` replaces `environment.ts` with `environment.prod.ts`.
// The list of file replacements can be found in `angular.json`.

export const environment = {
  production: false
};

/*
 * For easier debugging in development mode, you can import the following file
 * to ignore zone related error stack frames such as `zone.run`, `zoneDelegate.invokeTask`.
 *
 * This import should be commented out in production mode because it will have a negative impact
 * on performance if an error is thrown.
 */
// import 'zone.js/dist/zone-error';  // Included with Angular CLI.


/*
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/"><input type="hidden" name="files[src/main.ts]" value="import { enableProdMode } from '@angular/core';
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

import { AppModule } from './app/app.module';
import { environment } from './environments/environment';

if (environment.production) {
  enableProdMode();
}

platformBrowserDynamic().bootstrapModule(AppModule);


/*
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/"><input type="hidden" name="files[src/polyfills.ts]" value="/**
 * This file includes polyfills needed by Angular and is loaded before the app.
 * You can add your own extra polyfills to this file.
 *
 * This file is divided into 2 sections:
 *   1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
 *   2. Application imports. Files imported after ZoneJS that should be loaded before your main
 *      file.
 *
 * The current setup is for so-called &quot;evergreen&quot; browsers; the last versions of browsers that
 * automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera),
 * Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
 *
 * Learn more in https://angular.io/guide/browser-support
 */

/***************************************************************************************************
 * BROWSER POLYFILLS
 */

/** IE9, IE10 and IE11 requires all of the following polyfills. **/
// import 'core-js/es6/symbol';
// import 'core-js/es6/object';
// import 'core-js/es6/function';
// import 'core-js/es6/parse-int';
// import 'core-js/es6/parse-float';
// import 'core-js/es6/number';
// import 'core-js/es6/math';
// import 'core-js/es6/string';
// import 'core-js/es6/date';
// import 'core-js/es6/array';
// import 'core-js/es6/regexp';
// import 'core-js/es6/map';
// import 'core-js/es6/weak-map';
// import 'core-js/es6/set';

/**
 * If the application will be indexed by Google Search, the following is required.
 * Googlebot uses a renderer based on Chrome 41.
 * https://developers.google.com/search/docs/guides/rendering
 **/
// import 'core-js/es6/array';

/** IE10 and IE11 requires the following for NgClass support on SVG elements */
// import 'classlist.js';  // Run `npm install --save classlist.js`.

/** IE10 and IE11 requires the following for the Reflect API. */
/**
 * DO NOT REMOVE
 * By default, Reflect polyfills are auto-included by the CLI and
 * are required for JIT compilation.  StackBlitz examples are
 * compiled using JIT.
 */
import 'core-js/es6/reflect';
import 'core-js/es7/reflect';

/**
 * Web Animations `@angular/platform-browser/animations`
 * Only required if AnimationBuilder is used within the application and using IE/Edge or Safari.
 * Standard animation support in Angular DOES NOT require any polyfills (as of Angular 6.0).
 **/
// import 'web-animations-js';  // Run `npm install --save web-animations-js`.

/**
 * By default, zone.js will patch all possible macroTask and DomEvents
 * user can disable parts of macroTask/DomEvents patch by setting following flags
 */

 // (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
 // (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
 // (window as any).__zone_symbol__BLACK_LISTED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames

 /*
 * in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
 * with the following flag, it will bypass `zone.js` patch for IE/Edge
 */
// (window as any).__Zone_enable_cross_context_check = true;

/***************************************************************************************************
 * Zone JS is required by default for Angular itself.
 */
import 'zone.js/dist/zone';  // Included with Angular CLI.



/***************************************************************************************************
 * APPLICATION IMPORTS
 */


/*
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/"><input type="hidden" name="files[src/app/app.component.css]" value="button {
  min-width: 100px;
  font-size: 100%;
}

.box {
  border: 1px solid gray;
  max-width: 600px;
  padding: 4px;
}
.choices {
  font-style: italic;
}

code, .code {
  background-color: #eee;
  color: black;
  font-family: Courier, sans-serif;
  font-size: 85%;
}

div.code {
  width: 400px;
}

.heroic {
  font-size: 150%;
  font-weight: bold;
}

hr {
  margin: 40px 0
}

.odd {
  background-color:  palegoldenrod;
}

td, th {
  text-align: left;
  vertical-align: top;
}

p span { color: red; font-size: 70%; }

.unless {
  border: 2px solid;
  padding: 6px;
}

p.unless {
  width: 500px;
}

button.a, span.a, .unless.a {
  color: red;
  border-color: gold;
  background-color: yellow;
  font-size: 100%;
}

button.b, span.b, .unless.b {
  color: black;
  border-color: green;
  background-color: lightgreen;
  font-size: 100%;
}


/*
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/"><input type="hidden" name="files[src/styles.css]" value="/* Master Styles */
h1 {
  color: #369;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 250%;
}
h2, h3 {
  color: #444;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: lighter;
}
body {
  margin: 2em;
}
body, input[text], button {
  color: #888;
  font-family: Cambria, Georgia;
}
a {
  cursor: pointer;
  cursor: hand;
}
button {
  font-family: Arial;
  background-color: #eee;
  border: none;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
  cursor: hand;
}
button:hover {
  background-color: #cfd8dc;
}
button:disabled {
  background-color: #eee;
  color: #aaa;
  cursor: auto;
}

/* Navigation link styles */
nav a {
  padding: 5px 10px;
  text-decoration: none;
  margin-right: 10px;
  margin-top: 10px;
  display: inline-block;
  background-color: #eee;
  border-radius: 4px;
}
nav a:visited, a:link {
  color: #607D8B;
}
nav a:hover {
  color: #039be5;
  background-color: #CFD8DC;
}
nav a.active {
  color: #039be5;
}

/* everywhere else */
* {
  font-family: Arial, Helvetica, sans-serif;
}


/*
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/"><input type="hidden" name="files[src/app/app.component.html]" value="<h1>Structural Directives</h1>

<p>Conditional display of hero</p>

<blockquote>
<div *ngIf=&quot;hero&quot; class=&quot;name&quot;>{{hero.name}}</div>
</blockquote>

<p>List of heroes</p>

<ul>
  <li *ngFor=&quot;let hero of heroes&quot;>{{hero.name}}</li>
</ul>


<hr>

<h2 id=&quot;ngIf&quot;>NgIf</h2>

<p *ngIf=&quot;true&quot;>
  Expression is true and ngIf is true.
  This paragraph is in the DOM.
</p>
<p *ngIf=&quot;false&quot;>
  Expression is false and ngIf is false.
  This paragraph is not in the DOM.
</p>

<p [style.display]=&quot;'block'&quot;>
  Expression sets display to &quot;block&quot;.
  This paragraph is visible.
</p>
<p [style.display]=&quot;'none'&quot;>
  Expression sets display to &quot;none&quot;.
  This paragraph is hidden but still in the DOM.
</p>

<h4>NgIf with template</h4>
<p>&amp;lt;ng-template&amp;gt; element</p>
<ng-template [ngIf]=&quot;hero&quot;>
  <div class=&quot;name&quot;>{{hero.name}}</div>
</ng-template>

<hr>

<h2 id=&quot;ng-container&quot;>&amp;lt;ng-container&amp;gt;</h2>

<h4>*ngIf with a &amp;lt;ng-container&amp;gt;</h4>

<button (click)=&quot;hero = hero ? null : heroes[0]&quot;>Toggle hero</button>

<p>
  I turned the corner
  <ng-container *ngIf=&quot;hero&quot;>
    and saw {{hero.name}}. I waved
  </ng-container>
  and continued on my way.
</p>
<p>
  I turned the corner
  <span *ngIf=&quot;hero&quot;>
    and saw {{hero.name}}. I waved
  </span>
  and continued on my way.
</p>

<p><i>&amp;lt;select&amp;gt; with &amp;lt;span&amp;gt;</i></p>
<div>
  Pick your favorite hero
  (<label><input type=&quot;checkbox&quot; checked (change)=&quot;showSad = !showSad&quot;>show sad</label>)
</div>
<select [(ngModel)]=&quot;hero&quot;>
  <span *ngFor=&quot;let h of heroes&quot;>
    <span *ngIf=&quot;showSad || h.emotion !== 'sad'&quot;>
      <option [ngValue]=&quot;h&quot;>{{h.name}} ({{h.emotion}})</option>
    </span>
  </span>
</select>

<p><i>&amp;lt;select&amp;gt; with &amp;lt;ng-container&amp;gt;</i></p>
<div>
  Pick your favorite hero
  (<label><input type=&quot;checkbox&quot; checked (change)=&quot;showSad = !showSad&quot;>show sad</label>)
</div>
<select [(ngModel)]=&quot;hero&quot;>
  <ng-container *ngFor=&quot;let h of heroes&quot;>
    <ng-container *ngIf=&quot;showSad || h.emotion !== 'sad'&quot;>
      <option [ngValue]=&quot;h&quot;>{{h.name}} ({{h.emotion}})</option>
    </ng-container>
  </ng-container>
</select>
<br><br>

<hr>

<h2 id=&quot;ngFor&quot;>NgFor</h2>

<div class=&quot;box&quot;>

<p class=&quot;code&quot;>&amp;lt;div *ngFor=&quot;let hero of heroes; let i=index; let odd=odd; trackBy: trackById&quot; [class.odd]=&quot;odd&quot;&amp;gt;</p>
<div *ngFor=&quot;let hero of heroes; let i=index; let odd=odd; trackBy: trackById&quot; [class.odd]=&quot;odd&quot;>
  ({{i}}) {{hero.name}}
</div>

<p class=&quot;code&quot;>&amp;lt;ng-template ngFor let-hero [ngForOf]=&quot;heroes&quot; let-i=&quot;index&quot; let-odd=&quot;odd&quot; [ngForTrackBy]=&quot;trackById&quot;/&amp;gt;</p>
<ng-template ngFor let-hero [ngForOf]=&quot;heroes&quot; let-i=&quot;index&quot; let-odd=&quot;odd&quot; [ngForTrackBy]=&quot;trackById&quot;>
  <div [class.odd]=&quot;odd&quot;>({{i}}) {{hero.name}}</div>
</ng-template>

</div>
<hr>

<h2 id=&quot;ngSwitch&quot;>NgSwitch</h2>

<div>Pick your favorite hero</div>
<p>
  <label *ngFor=&quot;let h of heroes&quot;>
    <input type=&quot;radio&quot; name=&quot;heroes&quot; [(ngModel)]=&quot;hero&quot; [value]=&quot;h&quot;>{{h.name}}
  </label>
  <label><input type=&quot;radio&quot; name=&quot;heroes&quot; (click)=&quot;hero = null&quot;>None of the above</label>
</p>

<h4>NgSwitch</h4>

<div [ngSwitch]=&quot;hero?.emotion&quot;>
  <app-happy-hero    *ngSwitchCase=&quot;'happy'&quot;    [hero]=&quot;hero&quot;></app-happy-hero>
  <app-sad-hero      *ngSwitchCase=&quot;'sad'&quot;      [hero]=&quot;hero&quot;></app-sad-hero>
  <app-confused-hero *ngSwitchCase=&quot;'app-confused'&quot; [hero]=&quot;hero&quot;></app-confused-hero>
  <app-unknown-hero  *ngSwitchDefault           [hero]=&quot;hero&quot;></app-unknown-hero>
</div>

<h4>NgSwitch with &amp;lt;ng-template&amp;gt;</h4>
<div [ngSwitch]=&quot;hero?.emotion&quot;>
  <ng-template [ngSwitchCase]=&quot;'happy'&quot;>
    <app-happy-hero [hero]=&quot;hero&quot;></app-happy-hero>
  </ng-template>
  <ng-template [ngSwitchCase]=&quot;'sad'&quot;>
    <app-sad-hero [hero]=&quot;hero&quot;></app-sad-hero>
  </ng-template>
  <ng-template [ngSwitchCase]=&quot;'confused'&quot;>
    <app-confused-hero [hero]=&quot;hero&quot;></app-confused-hero>
  </ng-template >
  <ng-template ngSwitchDefault>
    <app-unknown-hero [hero]=&quot;hero&quot;></app-unknown-hero>
  </ng-template>
</div>

<hr>

<h2>&amp;lt;ng-template&amp;gt;</h2>
<p>Hip!</p>
<ng-template>
  <p>Hip!</p>
</ng-template>
<p>Hooray!</p>

<hr>

<h2 id=&quot;appUnless&quot;>UnlessDirective</h2>
<p>
  The condition is currently
  <span [ngClass]=&quot;{ 'a': !condition, 'b': condition, 'unless': true }&quot;>{{condition}}</span>.
  <button
    (click)=&quot;condition = !condition&quot;
    [ngClass] = &quot;{ 'a': condition, 'b': !condition }&quot; >
    Toggle condition to {{condition ? 'false' : 'true'}}
  </button>
</p>
<p *appUnless=&quot;condition&quot; class=&quot;unless a&quot;>
  (A) This paragraph is displayed because the condition is false.
</p>

<p *appUnless=&quot;!condition&quot; class=&quot;unless b&quot;>
  (B) Although the condition is true,
  this paragraph is displayed because appUnless is set to false.
</p>


<h4>UnlessDirective with template</h4>

<p *appUnless=&quot;condition&quot;>Show this sentence unless the condition is true.</p>

<p *appUnless=&quot;condition&quot; class=&quot;code unless&quot;>
  (A) &amp;lt;p *appUnless=&quot;condition&quot; class=&quot;code unless&quot;&amp;gt;
</p>

<ng-template [appUnless]=&quot;condition&quot;>
  <p class=&quot;code unless&quot;>
    (A) &amp;lt;ng-template [appUnless]=&quot;condition&quot;&amp;gt;
  </p>
</ng-template>



<!-- 
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
-->"><input type="hidden" name="files[src/index.html]" value="<!DOCTYPE html>
<html lang=&quot;en&quot;>
  <head>
    <title>Angular Structural Directives</title>
    <base href=&quot;/&quot;>
    <meta charset=&quot;UTF-8&quot;>
    <meta name=&quot;viewport&quot; content=&quot;width=device-width, initial-scale=1&quot;>
  </head>

  <body>
    <app-root></app-root>
  </body>

</html>


<!-- 
Copyright Google LLC. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
-->"><input type="hidden" name="files[angular.json]" value="{
  &quot;$schema&quot;: &quot;./node_modules/@angular/cli/lib/config/schema.json&quot;,
  &quot;version&quot;: 1,
  &quot;newProjectRoot&quot;: &quot;projects&quot;,
  &quot;projects&quot;: {
    &quot;angular.io-example&quot;: {
      &quot;root&quot;: &quot;&quot;,
      &quot;sourceRoot&quot;: &quot;src&quot;,
      &quot;projectType&quot;: &quot;application&quot;,
      &quot;prefix&quot;: &quot;app&quot;,
      &quot;schematics&quot;: {},
      &quot;architect&quot;: {
        &quot;build&quot;: {
          &quot;builder&quot;: &quot;@angular-devkit/build-angular:browser&quot;,
          &quot;options&quot;: {
            &quot;outputPath&quot;: &quot;dist&quot;,
            &quot;index&quot;: &quot;src/index.html&quot;,
            &quot;main&quot;: &quot;src/main.ts&quot;,
            &quot;polyfills&quot;: &quot;src/polyfills.ts&quot;,
            &quot;tsConfig&quot;: &quot;src/tsconfig.app.json&quot;,
            &quot;assets&quot;: [
              &quot;src/favicon.ico&quot;,
              &quot;src/assets&quot;
            ],
            &quot;styles&quot;: [
              &quot;src/styles.css&quot;
            ],
            &quot;scripts&quot;: []
          },
          &quot;configurations&quot;: {
            &quot;production&quot;: {
              &quot;fileReplacements&quot;: [
                {
                  &quot;replace&quot;: &quot;src/environments/environment.ts&quot;,
                  &quot;with&quot;: &quot;src/environments/environment.prod.ts&quot;
                }
              ],
              &quot;optimization&quot;: true,
              &quot;outputHashing&quot;: &quot;all&quot;,
              &quot;sourceMap&quot;: false,
              &quot;extractCss&quot;: true,
              &quot;namedChunks&quot;: false,
              &quot;aot&quot;: true,
              &quot;extractLicenses&quot;: true,
              &quot;vendorChunk&quot;: false,
              &quot;buildOptimizer&quot;: true,
              &quot;budgets&quot;: [
                {
                  &quot;type&quot;: &quot;initial&quot;,
                  &quot;maximumWarning&quot;: &quot;2mb&quot;,
                  &quot;maximumError&quot;: &quot;5mb&quot;
                }
              ]
            }
          }
        },
        &quot;serve&quot;: {
          &quot;builder&quot;: &quot;@angular-devkit/build-angular:dev-server&quot;,
          &quot;options&quot;: {
            &quot;browserTarget&quot;: &quot;angular.io-example:build&quot;
          },
          &quot;configurations&quot;: {
            &quot;production&quot;: {
              &quot;browserTarget&quot;: &quot;angular.io-example:build:production&quot;
            }
          }
        },
        &quot;extract-i18n&quot;: {
          &quot;builder&quot;: &quot;@angular-devkit/build-angular:extract-i18n&quot;,
          &quot;options&quot;: {
            &quot;browserTarget&quot;: &quot;angular.io-example:build&quot;
          }
        },
        &quot;test&quot;: {
          &quot;builder&quot;: &quot;@angular-devkit/build-angular:karma&quot;,
          &quot;options&quot;: {
            &quot;main&quot;: &quot;src/test.ts&quot;,
            &quot;polyfills&quot;: &quot;src/polyfills.ts&quot;,
            &quot;tsConfig&quot;: &quot;src/tsconfig.spec.json&quot;,
            &quot;karmaConfig&quot;: &quot;src/karma.conf.js&quot;,
            &quot;styles&quot;: [
              &quot;src/styles.css&quot;
            ],
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